1893994 has 4 divisors (see below), whose sum is σ = 2840994. Its totient is φ = 946996.

The previous prime is 1893979. The next prime is 1894001. The reversal of 1893994 is 4993981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4993981 = 1123 ⋅4447.

It can be written as a sum of positive squares in only one way, i.e., 1703025 + 190969 = 1305^2 + 437^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1893994.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473497 + ... + 473500.

2^1893994 is an apocalyptic number.

1893994 is a deficient number, since it is larger than the sum of its proper divisors (947000).

1893994 is an equidigital number, since it uses as much as digits as its factorization.

1893994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946999.

The product of its digits is 69984, while the sum is 43.

The square root of 1893994 is about 1376.2245456320. The cubic root of 1893994 is about 123.7255898525.

The spelling of 1893994 in words is "one million, eight hundred ninety-three thousand, nine hundred ninety-four".